Re: st: QUERY: svyset for a single stage survey with strata and clusters

Re: st: QUERY: svyset for a single stage survey with strata and clusters

Date

Tue, 21 Aug 2007 18:26:26 -0400

David, your specification is incorrect, but your question cannot be
answered without one piece of information: was sampling with or
without replacement? I'll assume that it was without replacement,
the most likely method. In that case, do the following:

1. Create a variable nschools, which is the number of schools in each
stratum--the population number not the sample number.

If your purpose is to do statistical tests or other analytic
comparisons, do NOT include the "fpc" (finite population correction)
terms (WE Deming, Some Theory of Sampling, Wiley, 1950 (Dover,
1984)). The fpc terms are appropriate only for descriptive studies.

12 types of schools in London were identified. The type of school is
in a variable called 'schtype'. We sampled at random a certain
number of schools of each type. The school identifier is called
'schl'.
The selection school probability is held in a variable called
'include'.
In each school all children were sampled regardless of the number of
children.

Hence I take it the strata variable is 'schtype', the cluster
variable is
'schl' and the fpc is 'include'.